Pressure lubricator



Oct. 4,k 1927. 1,644,343

J. F. MaclNDoE PRESSURE LUBRICATOR Filed Jan. 11, 1927 y willhereinafter appear.

Patented' oci. 4, i927.

, Urrea-ST;

TES-

A yfiaRn-ssimii LuBRioA'ioR,

Apliiicaiin' ined January 1i, ieaafseriaim. 160,389.` f

Y The .presentlinvention relatesto grease cups and pressure actuated'lubricators of the general type disclosed in Patents Nos. 1,263,843 and1,383,181, and i-elatesmore particularly to a multi-'stage lubricator. IASome of the objects of the presentfinvention are to provide an improvedlubricator of the cup type; to provide a lubricator of thespring'pre'ssure operated typel having a meansffor automaticallycompensating for the diminishing pressure of the spring during theoperation of the lubricator; to provde means for eliminating'theresistanceV tok the flow of lubricant from a 'pressureactuated'lubricant cup ,to provide for the successive expansion ofa'lubricant as itis discharged from a lubricating cup; to provide animproved means for `preventing leakage ypast the piston of a pressureactuated lubri cator; and to provide other improvements as In theaccompanying drawings, Fig. 1 ,represents a side elevation of alubricator embodying one form of the presentinven-y tion; Fig. 2represents a section on line 2-2 of Fig. 1; Fig 3 represents a sectionon line of Fig. 2;' Fig. 4 represents a detail, in part section of theplunger andits adjuncts; Fig. 5 represents a plan'v of the plungerWasheryFig. 6 represents a section onv line 6 6 of Fig. 5; Fig. 7represents a detail of the upper end iof the plunger;l and Fig. 8represents a modified form' of the upper end of the plunger; Y, jReferring to the drawings, one form of the fpresent invention consistsof a V'cup body 10 Aarranged in telescopic relation" with a cap'closure, 11 which,v corresponds .generally in length to the length ofthe body 10. Thus in assembled condition the body has its sides and openended top enclosed by the cap closure 11, the two parts beiiigconnectedby a bayonet type of joint formed by out- Wardly pressed llugs 12 on thebody 10 andy slots 13 leading tofseats 14 of the cap'closure 11.Preferably also the bodylO and cap 11 have diameters designed to providea clear ance space 15l betvveen'the two .and communicating Withtwovertically located vent grooves 16 which open respectively at theirlower ends into the'slots 13. These grooves 16 thusprovide a dischargeforany lubricant which, through-leakage 4or otherwise, becomesvtrappedbetween the body 10,and the cap 11. The bottomV 17 ofthe cup 10 is ofconcave contour and carriesl anv axially disposed discharge fitting Q18y having af i l A threadedportion 20 forv attachment to the*H 1 part .tobe lubricated, or to a'conduitcarryfl; ""fvf'io In order to dischargethe lubricant from ing the lubricantto such part.

the'cup 1 0, the fitting 18 -hasla bore-22V eX-` tendingtherethroughfand in thek present TE Tie-'GFF1655( construction ythisbore 22 -is dividedjintofy lengths ofvarying diameter, the arrange`vrment being suchthat the bore 22 increases by successive stages: Thusthelubricant enters the bore 22'at the stageof `smallest diameterand'leaves by the stage'of greatest i diameter, While theintermediatestages areIv all larger than the irstbutsmallerfthan the last zstage.

determined manner, a plunger rod 2,3 is provided which has a bearing forsliding move' ment through the cap 11 at its'upperend vwhile its lowerend is of reduced diameter, 'as shown at 24 and 25 to receive' a piston26,

and lterminates inv an extension 27 provided For discharging thelubricant from thel cup' 1() and controlling such discharge in ay pre-y'sa i with a head 28. The head 28 kis in the nature f' vof a controlvalvebecause its vdiameter isV proportioned with respect" to thedischarge bore 22, so that the amount of lubricant discharged'around thehead 28 When in the smallest stage position can be accuratelyv gauged.The lpiston 26 is of the leather type and is held fastV to the Vrod 23by] Washeis30 and 31 which rigidly clamp the piston 26l between-fthe.shoulders of there? ducedparts of the rod.- A coil `spring 32vis n.lcompressed bet-Ween theV piston26 and the p end of the :cap 11 and thepiston stroke can be regulated by a collar 33 adjustablyheld on theprojectingend of the .v rod 23. The.

piston 26 is automatically pressed against the Wall vof the vcup 10 b ythepressiire of the lubricant actiiig against a fcircumferential; Igroove 34- provided in the bottom face'of the ry piston.

. AInFigsY and 8 a modiiiediform of stroke ico adjustment is provided byan adjustable collar 35von the rod 23 and Whichl islimited by acircumferential lip36 formed onjthefend ofthe rodV 23. AThis collar'35alsoserves by tion, lthe cup-1 0 is filled `With 'lubricant and itspositionvvith respect to the top lof thecap closure 11 to indicate thequantity of'lubri-l 'cant inthe cup 10. Y 1 Y l In, using thedevijce ofthe present inveninsertedyvithin the lowerend of the 'clap 11 f Where itreceivesthe piston 26-and is forced Y y Y. pdftd .Compressithe Sprlngf3% antik the lugs l2"enterfthl slots 13 s() -thatthe *cap 11" 't'getheinfThisplacrs the Spring 32 und@ under the pressureV Q f Vthe exandingfOfthGfpiirposes-intended;k Y

supplies just desired: amQunt nii lnbicantfY Hijsj inv/enigmi; mayv beyembdiedowitis to be understood that-the invention is not limited to anyspecificV construction, but nn'ghn be appliedgtgV Variousl forms Withoutdeparting of theag'fpendedY claim. r .f

Vfrom the Spil-it olt-heinvention or the' scope K i claim a cup havingX@stepped dishaige borg foin-fl n creasa'thgdiharge areaby sta'gsfromsidj' cup.to;thdoufclejh,V ancap orksaid, cup, a Spring f :V

andbeziiing upon lubricant in-saidcnp and? an extension?connected toySad] plStQn having a, head1 lfocaedfin Said' bore. J

